This study was a prospective, multicenter, observational cohort study. Patients with neck pain of any duration, who fulfilled the inclusion criteria, were recruited in a practice-based study. Data were collected on the patients and from the chiropractors at baseline, the first 3 visits, and at 3 and 12 months. Clinical outcome measures included (1) neck pain in the 24 hours preceding the visit, (2) neck disability, (3) treatment satisfaction, (4) global assessment, and (5) adverse events.

529 subjects were involved in the trial, under the care of 79 different chiropractors. Follow-up was possible for 90% and 92%, respectively, at 3 and 12 months. It should be noted that most patients in this study had chronic, recurrent complaints; mild to moderate disability of the neck; and a mild amount of pain at baseline.

Approximately half of these patients reported they were recovered by their 4th visit, and approximately two thirds of them reported sustained benefit during followup at 3 and at 12 months.

The researchers found that although some patients report mild and brief adverse responses after the first few visits, that a large percentage of the patients report recovery, particularly in the long term.

The natural (and only) conclusion from this trial is that the benefits of chiropractic care for neck pain certainly seem to outweigh any potential risks.